staging: bcm2835-camera: Convert struct mmal_buffer_header info fields to u32

The struct mmal_buffer_header has multiple fields used for informational
and debugging purposes.  These are safe to convert to u32.
Signed-off-by: Michael Zoran <mzoran@crowfest.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vc04_services/bcm2835-camera/mmal-msg.h

@@ -255,18 +255,18 @@ struct mmal_driver_buffer {
 
 /* buffer header */
 struct mmal_buffer_header {
-	struct mmal_buffer_header *next; /* next header */
-	void *priv; /* framework private data */
+	u32 next; /* next header */
+	u32 priv; /* framework private data */
 	u32 cmd;
-	void *data;
+	u32 data;
 	u32 alloc_size;
 	u32 length;
 	u32 offset;
 	u32 flags;
 	s64 pts;
 	s64 dts;
-	void *type;
-	void *user_data;
+	u32 type;
+	u32 user_data;
 };
 
 struct mmal_buffer_header_type_specific {

drivers/staging/vc04_services/bcm2835-camera/mmal-vchiq.c

@@ -536,7 +536,8 @@ buffer_from_host(struct vchiq_mmal_instance *instance,
 
 	/* buffer header */
 	m.u.buffer_from_host.buffer_header.cmd = 0;
-	m.u.buffer_from_host.buffer_header.data = buf->buffer;
+	m.u.buffer_from_host.buffer_header.data =
+		(u32)(unsigned long)buf->buffer;
 	m.u.buffer_from_host.buffer_header.alloc_size = buf->buffer_size;
 	m.u.buffer_from_host.buffer_header.length = 0;	/* nothing used yet */
 	m.u.buffer_from_host.buffer_header.offset = 0;	/* no offset */